Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9658fa556612941…

MALICIOUS

PDF

89.4 KB Created: 2021-05-13 07:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d5bde67828f48d40582dfc9d8a762837 SHA-1: ebb11da1e700aec5d8220942f5cd10a73821c8cb SHA-256: e9658fa556612941d1104647cbc3c0b5f31efc1039c4888a8c050f5b8e3cfb45
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs and is identified as a link farm hosted on disposable domains, indicating a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the structure and embedded URLs suggest an attempt to lead the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/strik?utm_term=lc+code+rinnai PDF link annotation
    • https://cdn.sqhk.co/bujasugawo/jehjxjb/66024572254.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Cm9jfWu/13324013923.pdfIn PDF document text
    • https://pidowiwosuzaji.weebly.com/uploads/1/3/0/9/130969191/rojap-rosemigerowo-molonufevake-pinedibabuku.pdfIn PDF document text
    • http://complect-tech.ru/oster_roaster_oven_recipes_for_turkeyc27lh.pdfIn PDF document text
    • http://beremoter.online/kinobody_superhero_downloadt6i58.pdfIn PDF document text
    • https://cdn.sqhk.co/bodavadu/do1qqZ2/ifly_gps_720.pdfIn PDF document text
    • http://gedozudusinap.mygamesonline.org/sample_anecdotal_records_of_students.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/zumirubujobuvikipi.pdfIn PDF document text
    • https://rojurunonujimos.weebly.com/uploads/1/3/5/3/135325454/buvesokidulitis-sisabodoluka.pdfIn PDF document text
    • https://zazewefagawi.weebly.com/uploads/1/3/0/7/130776698/lemubonomadav-nodijimakimu-pigizufeton-dedewerim.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/ieijjaO/blender_game_engine_android_export.pdfIn PDF document text
    • http://silver35.ru/10630828773masab.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/kipefatu.pdfIn PDF document text
    • http://kufowawixapiva.sportsontheweb.net/ragofisilotovefatipuvo.pdfIn PDF document text
    • http://magexaxajatadog.getenjoyment.net/deguzufixaxazer.pdfIn PDF document text
    • http://ruregere.sportsontheweb.net/vascular_dementia_treatment.pdfIn PDF document text
    • http://erogan24.website/18133861625iigi3.pdfIn PDF document text
    • http://jabofedu.sportsontheweb.net/gomonetefimulenegavo.pdfIn PDF document text
    • http://amorexpo.com/1827777871816j03.pdfIn PDF document text
    • https://zokaguwozan.weebly.com/uploads/1/3/0/7/130738936/wofosedini.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e16ae8-8df8-4739-a733-208767c07061/46791249367.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d68f5cd-5464-47e7-8d85-b402103a56ab/what_year_honda_accord_has_transmission_problems.pdfIn PDF document text
    • http://xijewixevav.onlinewebshop.net/22887266550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd182708-46de-4ac4-a119-f98ff7f5718a/what_type_of_oil_does_a_ryobi_generator_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e449a7f-d639-49e0-b6ac-f9eaca0cbce3/wiloxesemaluvi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AB 4664 bytes
SHA-256: fc49dbfb195e9c5b50e1317085adda1ff8a10daa56bbc007c304b489048981a5
font_01_sfnt_off00013191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13191 11040 bytes
SHA-256: 222cbf1d3814950360e192528c0cf666261e469b487c2e44f287eef173e018d7